Decay and recovery processes in pattern recognition produced by prolonge

本研究探讨了长时间观看不同图形所产生的图形识别的衰退和恢复过程。1.用不同偏心率的刺激呈现来分析纹理图形的消失。偏心率越大，消失时间越短。研究发现，在长时间观察中消失的区域填充了与其外部区域相同的纹理元素。这一现象可以用Grossberg的边界轮廓系统和特征轮廓系统理论来解释。2.从长时间观看后汉字识别时间的分析来看，无论是顺应汉字还是测试汉字，无论是模式还是结构都存在显著的延迟。在长时间观看之后，延迟效应持续了15秒以上。研究结果还表明，汉字的内部表征部分独立于汉字的大小和方位。这些发现发表在《日本心理学研究》上的一篇文章上。3.还调查了长时间观看对面部表情识别的影响。只有当受试者看到在愉悦维度上有较高值的面孔时，才会出现显著的识别延迟。相比之下，长时间观看在唤醒维度上有较高值的面孔不会产生任何影响。有人认为，至少有两个子系统参与面部表情识别，每个系统都有不同的时间特征。

The present study investigated decay and recovery processes in pattern recognition produced by prolonged viewing of various patterns.1.Disappearance of texture pattern was analyzed with varing eccentricity of stimulus presentation. The time for disappearance became shorter with the increase of eccentricity. It was found that a region which disappears in prolonged viewing is filled with the same texture elements as its outer area. This phenomenon can be explained by the Grossberg's theory which postulates the boudary contour system and the feature contour system.2.From analyzes of Kanji recognition times after prolonged viewing, significant delays were found not only when adaptation and test Kanjis were of the same pattern, but also when they had the same structure. The delay effect continued more than 15 sec after the prolonged viewing. The results also suggest that internal representations of Kanjis are partly independent from their size and orientation. These findings were published on an article in Japanese Psychological Research.3.The effects of prolonged viewing on recognition of facial expressions were also investigated. Siginificant recognition delays occurred only when the subjects viewed the faces which had higher values on the pleasantness dimension. In contrast, the prolonged viewing of faces which had high values on the arousal dimension produced no effect. It was suggested that there are at least two subsystems involved in the recognition of facial expressions and that each system has different temporal characteristics.